薄膜铌酸锂切趾啁啾光栅研究  

Investigation of Apodized Chirped Grating on Thin-film Lithium Niobate

作　　者：隆嘉轩 吴侃[1] 蔡明璐 张栩嘉 陈建平[1] LONG Jiaxuan;WU Kan;CAI Minglu;ZHANG Xujia;CHEN Jianping(State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学区域光纤通信网与新型光通信系统国家重点实验室,上海200240

出　　处：《光子学报》2024年第8期80-90,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61922056)。

摘　　要：本文研究了基于薄膜铌酸锂的啁啾光栅性能,采用仿真分析的方法,研究了不同设计参数下,三种光栅切趾方式对称线性切趾、非对称线性切趾和高斯切趾在反射带宽和群延迟色散上的差异。通过最优化设计,在高斯切趾的啁啾光栅下,实现了3 dB带宽21.2 nm、群延迟色散值0.1385 ps/nm的啁啾光栅。本工作将为实现薄膜铌酸锂片上色散补偿和光信号处理奠定基础。The fields of high-performance optical signal processing,optical computing,microwave photonics,and high-speed optical communications are important directions for photonics research.In these systems,dispersion compensation is a key technology to eliminate signal distortion and improve signal quality.Typical dispersion compensation usually has three methods:first,the use of dispersioncompensated optical fibres,whose technical advantage lies in the fact that very large dispersion values can be obtained and both normal and anomalous dispersion compensation can be taken into account,but they are usually large in size and introduce additional nonlinear accumulations;second,digital equalizers,which usually provide dispersion compensation for Wavelength-Division-Multiplexing(WDM)systems,are highly flexible and have a stable amplitude response,but are complex in design and have high costs.The last method is the fibre Bragg grating,which has the greatest advantage of wavelength coding characteristics and tunability,but it requires relatively high process accuracy.Although the above three methods can obtain large dispersion values and better dispersion compensation effects,but for the integrated on-chip photonic system,it is more desirable to have an integrated dispersion compensation scheme to adapt to the integration needs of the on-chip system.Recently,lithium niobate has received much attention due to its high quality material properties.Its ultra-wide transmission band,excellent electrooptic coefficient and second-order nonlinear coefficient compared to other materials make it possible to realize active and passive devices with various functions.As the research on thin-film lithium niobate intensifies,soliton lasers and pulse compression on lithium niobate materials have also been studied more extensively,and dispersion compensation based on thin-film lithium niobate becomes particularly important.In this paper,we explore the application of chirped Bragg gratings for dispersion compensation on the lithium niobate platf

关 键 词：啁啾光栅 切趾 绝缘体上铌酸锂 色散补偿 群延迟 

分 类 号：TN256[电子电信—物理电子学]